Alimentacion y crecimiento de juveniles de corvina, Micropogon opercularis, en condiciones experimentales

Resumo

The present paper deals with the results obtained on the basis of studies on the feeding and growth of juveniles of the croaker, Micropogon opercularis in experimental conditions. The following, more important results, were obtained: 1. - The values of the daily food requirement for the juveniles of 79-126 mm in total length and of 4.1-22 g in weight, at the beginning of the experiments, oscillated between 1,29 and 6,88%, with the average of 3,58 %. 2. -The efficiency of conversion of food is rather high and was calculated; for "normal" specimens as 19,45 % in average. 3. -Very big individual differences were observed in the growth of the juveniles. In the case of the total lengths, the rate of annual growth oscillated between 15,2 and 114,2% and. in the case of the weights, between 23,5 and 1114.5%. 4. -It was observed that in the scales of the juveniles under experiments the first annulus is not formed or is formed not always in a regular way.